# JER2512F2R050

**jieerrui** · Current Sense Resistors / Shunt Resistors · 2512

JER2512F2R050 from jieerrui, in a 2512. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | First terminal of the 2512 alloy current-sense resistor (electrode width E 0.90±0.20 mm small electrode or 2.20±0.20 mm large electrode); body 6.40±0.20 x 3.20±0.20 mm, rated up to 2 W/3 W. |
| 2 | 2 | passive | Second terminal of the 2512 alloy current-sense resistor, interchangeable with the first (non-polarized); operating temperature range -55°C to +170°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | jieerrui |
| Package | 2512 |
| Category | Resistors |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (code F = 1%) |  | -1 |  | 1 | % | Part-number tolerance code F | 1 |
| Temperature coefficient of resistance (2512, 2mΩ~500mΩ range) | TCR | -50 |  | 50 | ppm/°C | IEC60115-1 4.8; R0 at room temp vs R at +125°C or +155°C; 50 mΩ is within 2mΩ~500mΩ range | 2 |
| Insulation resistance |  | 100 |  |  | MΩ | Printed as >100MΩ for 2512 range | 2 |
| Rated power (2512, code 2) | P |  |  | 2 | W | Part-number power code 2 = 2W; power derated above 70°C ambient | 2 |
| Operating temperature range |  | -55 |  | 170 | °C | Operating Temperature Range as printed; derate rated power above 70°C ambient | 3 |
| Nominal resistance value | R |  | 50 |  | mΩ | Decoded from part number R050 = 50 mΩ (legend R050 code) | 1 |
| Solderability (electrode coverage) |  | 95 |  |  | % | J-STD-002B test B, 245±5°C, 2~3 s; min 95% coverage | 6 |
| Short time overload resistance change | ΔR | -1 |  | 1 | % | 5.0x rated power for 5 s, IEC60115-1 4.13 | 6 |
| Temperature cycling resistance change | ΔR | -1 |  | 1 | % | JESD22 JA-104, -55°C/+125°C, 1000 cycles, measured 24±4 h after | 6 |
| High temperature exposure resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 108, 125°C, 1000 h, measured 24±4 h after | 6 |
| Low temperature operation resistance change | ΔR | -1 |  | 1 | % | IEC60115-1 4.23.4, -55°C, 45 min | 6 |
| Biased humidity resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 103, 85°C/85%RH, 1000 h, 10% of operating power | 6 |
| Resistance to solder heat resistance change | ΔR | -1 |  | 1 | % | IEC60115-1 4.18, 260±5°C solder bath, 10±1 s | 6 |
| Operational life resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 108, 70±2°C, rated current 1.5 h on / 0.5 h off, 1000 +48/-0 h | 7 |
| Vibration resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 204, 5g, 20 min, 12 cycles, 10-2000 Hz | 7 |
| Mechanical shock resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 213, 100g half sine, 6 ms | 7 |
| Terminal strength resistance change | ΔR | -1 |  | 1 | % | AEC-Q200-006, 17.7N applied for 60±1 s | 7 |
| Thermal shock resistance change | ΔR | -1 |  | 1 | % | MIL-STD-202 107, -55/+125°C, 300 cycles, air-air | 7 |
| Terminal bending resistance change | ΔR | -1 |  | 1 | % | AEC-Q200-005, 2 mm deflection, 60 s | 7 |
| ESD resistance change | ΔR | -1 |  | 1 | % | AEC-Q200-002, 2 kV, 2 times at 1 s interval | 7 |

## CAD (KiCad official)

- Symbol: `JER2512F2R050`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `jer2512f2r050-etched.step` / `jer2512f2r050-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jer2512f2r050.step` / `jer2512f2r050.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [jieerrui datasheet](docs/jer2512f2r050-datasheet.pdf) (7 pp, sha256 `6c0d359d39546b43`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/jer2512f2r050-datasheet.pdf)